Strip-severing machine



July 30, 1929. c. SCHUMACHER STRIP SEVERING MACHINE Filed May 27, 1927 2 Sheets-Sheet 1 a ENVENTOEgW ATTORNEY July 30, 1929. c. SCHUMACHER 1,722,617

STRIP SEVERING MACHINE Filed May; 27, 1927 2 Sheets-Sheet 2 INVENTO XAMQJW ATTORNEY Patented July 30, 1929.

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CONRAD SCHUMACHER, OF LYNBBOOK, NEW YORK, ASSIGNOR TO AUTOSTROE PAT ENTS CORPORATION, OF DOVER, DELAWARE, A CORPORATION OF DELAWARE. A

STRIP-SEVEBING' MACHINE.

Application filed May 27, 1927. I Serial No. 194,669.

The invention of this application is shown and described in a joint application of this inventor and Henry J. Gaisman, filed March 28, 1923, which matured into Letters Patent No. 1,632,593.

The object of this invention is to provide simple and efficient means for expeditiously severing a continuous strip of steel or other metal into successive pieces, such as in the making of razor blades. The strip may first be provided with notches or perforations, at which points the strip will be severed for producing the successive blades, and one or more edges of the strip may be sharpened before it is cut into successive pieces or blades.

The invention comprises novel details of improvement that will be more fully hereinafter set forth and then pointed out in the claims.

Reference is to be had to the accompanying drawings forming a part hereof, wherein Fig. 1 is a plan view of a machine embodying my invention;

' Fig. 2 is a section on line 2, 2, in Fig. 1;

Fig. 3 is an enlarged partly broken plan view; 7

Fig. 4 is a section on line 4, 4, in Fig. 8;

Fig. 5 is a sectional detail in line 5, 5, in Fig. 3;

Figs. 6 and 7 are details of crank means;

Fig. 8 is a perspective detail of carriage controlling devices;

Fig. 9 is a detail section on the plane of line 9, 9, in Fig. 2, and

Fig. 10 is a detail of the blade strip.

Similar numerals of reference indicate corresponding parts in the several views.

The main frame of the machine may be of any suitable construction, being shown comprising a table-like top 1 having legs 1. A drive shaft is indicated at 2 journaled" in suitable bearings 2 in the frame, and which may be driven in any desired way, such as by means of gearing 3, 4 operated from any suitable source of power, such as pulleys and belt, which driving means may include clutch means for starting and stopping the shaft. A strip for the blade is indicated at A, shown provided with spaced notches or perforations a along the edge opposite the cutting edge a, (Fig. 10). The machine is provided with guiding means for the stripA, shown comprisin spaced rollers 5 which may be spring er toward. each other means of and blacks are slides 7 that carry the rollers, (Fig. 1). After passing the rollers 5 the strip is guided between stationary guides 8. A block 1 on table 1 supports the guides 8 and carries a reciprocative punch bar 9 in member 10, which punch bar has a hardened nose or tool 11 oper ative transversely respecting guides 8 to engage the strip A to sever or break it by a blow against the same, (Figs. 1, 3 and at). One of the guide members 8 is spaced at 12 for the entrance of the nose 11, (Fig. To resiliently resist the blow of the tool an anvil is provided at 13 loosely mounted respecting the guideway 8 and backed by the spring 1 1. Beneath the .guideway the strip 1s guided on a guide strip 15, (Figs. 4 and 5). A reciprocative head or bar 16 slides in a guideway 17 in block 1 and carries a spring pressed dog 18 which is adapted to engage in the notches of the strip A to feed the same. A hardened pin 19 extends through the dog 18 to engage the notches of the strip, (Fig. 5). The dog 18 is pivotally supported at 18 in such a manner that when head or bar 16 moves in the direction of the arrow w in Fig. 3 the dog will engage a notch a of strip A to feed the latter, and when said head moves in the opposite direction the dog will slide along the strip to engage the neXt notch a, and so on success'ively. The operating end of dog 18 travels in a slot 8 in. one of the guide parts 8, (Fig. 2). A friction dog 20 is pivotally supported at 21 and has a round end or bevelled nose to engage the blade strip, and is pressed toward the latter by means of spring 22,;(Figs. 1 and 3), whereby when strip A is fed the dog 20 will tilt to permit the feeding but will be resiliently pressed against the strip to resist return movement of the latter when dog 18 moves rearwardly along, the strip. 7

The punch bar 9'is normally pressed toward the strip by springs23 attached to block 1 and to a pin or the like 24 carried by the bar 9, as by a head 25 thereon. A spring pressed dog 26 pivoted at 27 is adapted to engage and re lease a stop 28 on bar 9 to retain and release or trip said bar, so that when the bar is released or tripped the spring means, 23 will force the bar with sudden driving impact toward strip A. A spring 291normally presses the dog toward bar 9, (Fig. 3),- T1 slide 15 a member or arrnfi ti engage a pin or projection 32 carried by bar 9 to cause the bar to retract from strip A and place springs 23 under increased tension. The bar 9 is shown provided with a slot 9 in which the member 30 is located, (Fig.4). The arm 30 is secured to head 16 and extends parallel therewith so as to be reciprocated with said head, The projection 32 is adapted to advance toward member 30 without interference by surface 31 when the parts are in the position to sever strip A, substantially as indicated in Fig. 3, when dog 26 has released the bar 9. When member or arm 30 is moved toward the bottom of Fig. 3 the surface 31 will be moved into engagement with projection 32 to withdraw bar 9 and to cause engagement of its stop 28 with dog 26. NVhen arm 30 moves in the last named direction a projection 3O on said arm will engage a pawl 33. pivoted on dog 26 at 34 and spring pressed toward arm 30 by a spring 35, being limited in such direction by a stop 36, (Fig. 3). When arm 30 moves in the last named direction its projection 3O by engagement with pawl 33 will cause dog 26 to tilt to release bar9, whereupon the latter will be moved suddenly toward strip A to sever the latter, and continued movement of arm 30 will cause release of its projection 3O from pawl 33, as in the position shown in Fig. 1, whereby dog 26 may return to position to again engage stop 28 when surface 31 of arm 30 .being engaged with projection 32 again moves bar 9 outwardly. It will be understood that each time that bar 16 moves in the direction of the arrow 00 the dog 18 will feed strip A a ,step equal to the length of a blade to bring, a notch a in opposition to the nose 11 of bar 9, as indicated by the dotted line 7) in Fig. 10, and when the bar 16 moves reversely the dog 18 will slip along the strip, the dog 26 will re lease bar 9 to strike a blow against strip A to sever the strip, as indicated at c in Fig. 10,

at a notch or perforation a, and the surface 31 will operate on projection 32 to reset bar 9 to be retained by dog 26 for the next working stroke, so that when bar 16 again advances the bar 9 will remain set while dog 18 feeds strip A for another blade, and so on successively. V r

To resiliently limit the striking distance of bar 9 its head 25 is adapted to engage a spring pressed cap 37 mounted adjustably on a hub ally connected with head 16 and pivota'lly connected with a crank pin at 43 carried by shaft 2. To regulate the thrust of the crank pin the same is shown'carried by a block 44 adjustable radially in a guideway 45 in a disk 46 secured upon shaft 2 and held in set position by screw 47, (Figs. 6 and 7) The blades may be delivered from the mabetween which the blades are fed, 9);

The carriage is normally fed in the direction of the arrow 1 in Fig. 1, for which purpose a flexible connection or rope 51 is attached to the carriage and passes over pulley 52 from which it depends and is provided with a weight 53 to pull the carriage. The carriage is provided with a longitudinally disposed rack 54 adapted to be engaged by dog 55 carried by a level 56 pivoted at 57 and pressed by a spring 58 toward the rack, (Figs. 1 and 8). The lever has projection 59 in the path of blades entering a space between adjacent strips48, When a desired series of blades have entered such space and have finally pushed against the projection 59 the latter will move the dog 55 out of engagement with rack 54, whereby the weight will pull the carriage and when the said blade has passed from the projection 59 the dog 55 will snap back against the rack to stop the carriage with the next space between the strips 48 in position to receive blades, and so on as the spaces between said strips are filled with blades. VVhen-the receiver 48 is charged with blades, or substantially so, it may be removed from the carriage and another replaced and the carriage will move back to the initial position, and so on.

The operation may be described as follows:

To commence operations the strip A is fed between the rollers 5 and through the guide 8 a suitable distance to be engaged dog 18, head 16 will. retreat from bar 9 and dog 26 will release bar 9 to cause it to sever strip A,

and before the limit of such travel of head 16 the surface 31 will engage projection 32 to reset'bar 9 to be held by dog 26 out of the path of strip A. Corresponding operations occur successively for each blade to be cut from strip A, such strip pushing the cut-off blades through guide 8 into theireceiver 48. When the cutting edge is formed on a steel strip A and the spaced notches a formed therein before the strip is hardened or tempered the metal is liable to shrink in some places before hardening, thereby disarranging the original spaced relation Of'SOHlG of the notches a with relation to one another, but the dog 18 will feed the strip step by step for each blade the required distance.

' In the examples illustrated the strip A is shown providedwith spaced backings B sue cessively located between the notches or pen forations a. Thestrip feeding and cuttingoff devices described are adapted to sever the strip A to produce successive blades or pieces whether or not the strip be provided with the backings. 1

Having now described my I claim is 1. In combination, means to guide a strip, a head having means to feed the strip, a cutter for the strip, a bar carrying the cutter, means to advance the cutter and bartoward the strip, a member operative by said head and cooperative with'the bar to retract the latter and the cutter, a dog cooperative with the bar to retain the latter retracted, and means cooperative between the dog and said member to operate the dog to trip the bar and cutter.

'2. In combination, means to guide a perforated strip, a reciprocative head havinga dog to cooperate with said strip,-a cutter for severing the strip, a bar carrying the cutter, means to advance the cutterand bar toward the strip, a member operative with said head and cooperative with said bar to retract the bar and cutter from the strip, means to retain the bar and cutter retracted, and means operative with said member and cooperative with said retaining means to operate the latter to trip the bar and cutter.

3. I11 combination, means to guide a perforated strip, means to feed said strip step by step, a cut-ter for the strip, a bar carrying the cutter, means to advance the cutter and bar toward the strip, a member operatively connected with said feeding means and cooperative with said bar to retract the latter and the cutter, retaining means for said bar, and means cooperative between said member and retaining means to operate the latter to trip the bar.

4. In combination, means to guide aperforated strip, means to feed said strip step by step, a cutter for the strip, a bar carrying the cutter, means to advance the cutter and bar toward the strip, a member operatively connected with said feeding means and cooperative with said bar to retract the latter and the cutter, a dog cooperative with the bar to retain the latter, and means coopera- 'ive between said member and dog to operate the latter to trip the bar.

5. In combination, means to guide a perforated strip, means to feed said strip step by step, a cutter for the strip, a bar carrying the cutter, means to advance the cutter and invention what bar toward the strip, a member operatively connected with said feeding means and cooperative with said bar to retract the latter and the cutter, a dog cooperative with the bar to retain the latter and provided with a pawl, said member having a projection to cooperate with said pawl adapted to operate the dog in one direction of movement to re lease the bar, said pawl permitting reverse the bar to retract the latter, a dog, said bar having a projection cooperative with the dogfor retaining the bar retracted, and means cooperative between said dog and member for operating the dog upon movement of the member in a direction to re tract the bar, said meanspermitting return of the member without operating the do 7 In combination, means to guide a perforated strip, a reciprocative head having a dog to engage the perforations in the strip, a cutter for severing the strip, a bar carrying the cutter, spring means to propel the bar and cutter toward the strip, a member operatively connected with said head and having an inclined portion cooperative with the bar to retract the latter, a dog, said bar having a projection cooperative with the dog for retaining the bar retracted, said dog having a pawl, said member having a projection cooperative with said pawl for operating the dog to release the bar when the member moves in the direction to retract the bar, said pawl permitting movement of said projection and member in the reverse direction without operating the do 8. In combination, means to guide a perforated strip, a reciprocative head having a dog to engage the perforations of the strip, a cutter for severing the strip, a bar carrying the cutter, spring means to propel the bar and cutter toward the strip, said bar having a slot, a member operatively connected with said head and operative in said slot, said member having an inclined portion cooperative with the bar to retract the latter, a dog, said bar havinga projection to cooperate with the dog for retaining the bar retracted, and means cooperative between said dog and member for operating the dog upon move-,

ment of the member in a direction to cause operation of the inclined portion of the member with the bar for moving the latter, said means permitting return of the member with out operating the dog.

9. In combination, means to feed a strip, a cutter for the strip, a bar carrying the cutter, spring means to propel the cutter toward the strip for severing it, means to retract and release the cutter, an adjustable stop cooperative with the bar to control the advance of the cutter to the strip, and spring means coo erative with said stop to resist thrust against the same during operation of bar,

10. In combination, means to feed a strip,

' a cutter for the strip, a bar carrying the cutnut cooperative with said hub to oppose and limit the thrust of the bar and cutter toward the strip, and spring means cooperative with said nut to resist thrust against the same during operation of the bar.

12. In combination, means to feed a strip, a cutter for the strip, a bar carrying the cutter, spring means to propel the cutter toward the strip for severing it, means to retract and release the cutter, a threaded hub, and a stopnut cooperative with said hub to oppose and limit the thrustof the bar and cutter toward the strip, said nut having recesses, pins operative in said recesses, an annular abutment for said pins, and springs cooperative be tween said pins and nut to resist thrust of the bar against the nut and to permit rotation of the nut.

13. In combination, means to feed a strip,

a cutter for the strip, a bar carrying the cutter, spring means to propel the cutter toward the, strip for severing it, means toretract and release the cutter, a threaded hub, a stop'nut cooperative with said hub tooppose and limit the thrust of the bar and cut ter toward the strip, spring means cooperative with said nut to resist thrust against the same during operation of the bar, said nut having exterior recesses, and a pin oooperative with the latter to retain the nut in set position.

CONRAD SGHUMAOHER. 

